Developer platform

API changelog and deprecation history

A dated record of public contract and delivery changes. The production OpenAPI document remains the source of truth for current paths and schemas.

Developer overview Webhook catalog

Current version

Public routes are versioned under /v1. No API v1 route is currently scheduled for deprecation or sunset.

Deprecation contract

A deprecated route returns Deprecation: true, a standards-based Sunset date, and a successor Link when a replacement exists.

2026-07-27Current

Public OpenAPI reachability

The production OpenAPI 3.1 document is available without authentication.
The public contract route uses a dedicated anonymous rate limit and short public cache policy.
The Developer Platform now reports an origin-side contract validation snapshot.

2026-07-26Current

Developer scope clarification

Public REST API v1, signed webhooks, partner OAuth, SDK distribution, and sandbox access boundaries were separated.
The production OpenAPI document was designated as the endpoint and schema source of truth.

2026-05-23Current

Webhook delivery hardening

Terminal workflow, approval, document, assistant-turn, and billing events were connected to outbound subscriptions.
HMAC signing, event identifiers, timestamped signatures, bounded delivery timeouts, retry scheduling, and replay controls were validated.

2026-05-19Current

API lifecycle headers

Deprecated routes return Deprecation and Sunset headers plus a successor Link when one exists.
No API v1 route is currently listed for deprecation or sunset.

Consumer responsibility

Validate before each integration release

Monitor response headers, compare the current OpenAPI contract, preserve request identifiers, and test retries and failure paths before production rollout.

For a contract review or migration question, contact [email protected].

Loading…